#include <REGX52.H>
#include <INTRINS.H>
void Delay1ms(unsigned int xms)		//@11.0592MHz
{
	unsigned char i, j;
	while(xms)
	{
		_nop_();
		i = 2;
		j = 199;
		do
		{
			while (--j);
		} 	while (--i);
		xms--;
	}
	
}


int main()
{
		while(1)
		{
			P2 = 0xFE;// 1111 1110
			Delay1ms(200);
			P2 = 0xFD;// 1111 1101 
			Delay1ms(200);
			P2 = 0xFB;// 1111 1011
			Delay1ms(200);
			P2 = 0xF7;// 1111 0111
			Delay1ms(200);
			P2 = 0xEF;// 1110 1111
			Delay1ms(200);
			P2 = 0xDF;// 1101 1111
			Delay1ms(200);
			P2 = 0xBF;// 1011 1111
			Delay1ms(200);
			P2 = 0x7F;// 0111 1111
			Delay1ms(200);
		}
}